Pc problems - pc takes a while to load, and txt files do not open

hi all
i have these weird problems on my pc for some reason.
firstly my pc takes ages to load. i mean, before it used to say Welcome and then go straight to the desktop (this is Windows XP professional btw). but now it says Welcome, and u have to wait for like a min or two to for it to go to the desktop.
i thought it wud be svmhost.exe AGAIN.. but i dont seem to find it on the pc. so its something new i guess.

secondly i cant open txt files. lets say theres a txt file on my desktop, i double click it, and i can just wait and wait, but nothing will happen. notepad doesnt even open up or anything. dunno y that is.

ive tried running adaware professional and deleted all the infected files it found. tried runnin norton anti virus too and it found over 40 infected files there. it wudnt delete so i had to delete them manually. (some files didnt even exist in the directories which norton gave me because i wud use windows explorer to go to the exact location but the file that has been infected isnt there. might need help here too ^^).

well thats it really.
below is my HiJackThis log. thought it might help solve my problems. (i had to use microsoft word to open the log file since notepad files dont work )

Huh, you have many malicious software installed...
One of them is Admilli Service (C:\Program Files\Admilli Service\AdmilliServ.exe and similar) and it can be easily removed if you follow the great instructions found on this page: Admilli removal instructions.
I hope it helps.